JP2006313136A - Device for sensing foreign substance at door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for sensing a foreign substance at a door capable of surely detecting a state that a small foreign substance, which can hardly be detected by the conventional method, for example, an umbrella is caught between the door, in an almost whole region of an edge at the opening side of the door. <P>SOLUTION: In the device, a transmitter and a receiver are arranged on a door elastic body such as a door tip rubber having, for example, a cylindrical hollow space, and a controller is provided for comparing the difference in an amount of signals between the transmitter and the receiver to continuously control the amount of transmitting signals and also receiving signals from an external circuit to set a detection reference value. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a foreign object detection device for a door that detects foreign objects that obstruct movement such as closing of a door such as an object that is sandwiched between doors when a door such as a passenger door of a vehicle is closed.

  Conventionally, as a method of detecting that a foreign object has been caught in a door such as a vehicle doorway, a method of providing a limit switch that physically detects that the door has reached a fully closed position has been adopted. Has been. However, because there is a safety need to protect the fingers etc. that are pinched by providing a flexible part such as door rubber at the front end of the door, the door rubber is not fully closed when the door is completely closed. An open margin (margin) greater than the deflection amount must be allowed, and there was an undetectable range of several millimeters to tens of millimeters or less.

  Therefore, as a method for directly detecting a foreign matter sandwiched between doors, a method using an optical sensor, a method using a pressure switch, and the like have been proposed in the past, and are used in addition to the method using the limit switch (for example, Patent Document 1).

          Patent Document 1: Published Utility Model No. 4-11772

  In the method using the optical sensor, there are proposed a method of detecting a reflected signal by irradiating a signal to a foreign object, a method of detecting that a transmission signal does not reach the receiver side due to the foreign object being blocked. In such a method, in order to prevent the misdetection due to the adjustment of the positional relationship between the foreign matter and the sensor and the reflection by the foreign matter such as the vehicle body, the detection range of the foreign matter and the size of the foreign matter that can be detected are individually set. It was necessary to make adjustments and corrections for each installation site, and the same adjustments were required for maintenance and management after installation.

  As a method using the pressure switch, a method has been proposed in which a mechanical pressure switch is built in the door rubber on the opening side of the door and the pressure switch is activated and detected when a foreign object is caught. However, the manufacture of the pressure switch itself, the method of installing the pressure switch in the rubber at the door, and the adjustment of the operating point of the pressure switch and its maintenance and management are complicated and difficult.

  Furthermore, both the optical sensor and the pressure switch detect unconditionally when a foreign object is caught in the door, so that it reacts to an object that does not have a safety problem and hinders the operation of the vehicle. There is a problem that is not spreading.

  In addition, in the conventional method, it is difficult to stably and reliably detect a state in which a relatively small foreign object such as rain gear is sandwiched, and adjustment and correction are difficult even when trying to detect stably and reliably. Also, if the door closes with foreign objects such as clothing hem or sleeves sandwiched and the vehicle starts to run without any safety problems, there is a danger that passengers left on the platform will be dragged. It was.

An object of the present invention is to solve the above-mentioned problems of the prior art.
Specifically, for a door that can reliably detect a small foreign object, such as rain gear, which is difficult to detect by the conventional method, in almost all of the door opening side edge. It is an object to provide a foreign object detection device.

  In addition, the door closes with foreign objects such as clothing hems and sleeves in between, and after the vehicle starts running, force is applied to the foreign objects to pull out the inserted foreign objects. It is an object of the present invention to provide a foreign object detection device for a door that can detect the situation when a force is applied by dragging a passenger when the vehicle starts traveling.

  It is another object of the present invention to provide a foreign object detection device for a door that does not require adjustment or correction at the time of installation, and that does not require readjustment with respect to aging.

The first means for solving the above-mentioned problem is
A door tip comprising an elastic body with a hollow portion provided at the tip of the door;
A transmitter and a receiver;
A control device for adjusting a signal amount of a transmission signal from the transmitter, and a detection device comprising:
The transmission signal from the transmitter is arranged so that the receiver receives it through the hollow portion of the elastic body provided at the door, and the transmission signal that fluctuates when the elastic body provided at the door is deformed. The signal amount of the transmission signal from the transmitter is adjusted so that the receiver can receive the signal amount,
A door characterized in that a foreign object in the door is detected by comparing a signal amount stored as a reference value in the control device with a signal amount of a received signal accompanying deformation of an elastic body provided at the door end. It is a foreign matter detection device for.

The second means is
A door tip provided with an elastic body having a hollow portion provided at the front end of a vehicle door,
A transmitter and a receiver;
A control device for adjusting a signal amount of a transmission signal from the transmitter, and a detection device comprising:
The transmission signal from the transmitter is arranged so that the receiver receives it through the hollow portion of the elastic body provided at the door, and the transmission signal that fluctuates when the elastic body provided at the door is deformed. Adjust the signal amount of the transmission signal from the transmitter so that the signal amount can be received by the receiver,
By temporarily storing, as a reference value, the signal amount of the reception signal before starting the vehicle travel to the control device, and then comparing the signal amount of the reception signal when the elastic body provided on the door is deformed, Detects foreign objects on the door,
It is a foreign object detection device for a door characterized by detecting a deformation of an elastic body provided at a door end of a door that is recognized to be in a closed state even after the vehicle starts to travel.

  In the present invention, since it is possible to continue using the detection sensitivity to the deformation of the elastic body having a hollow portion provided at the front end of the door within a certain range, it is not necessary to provide a dead zone for preventing false detection, Continued use without false detection with higher detection sensitivity. Therefore, it is possible to use a small foreign object with a high sensitivity and a setting that can be stably detected.

  Furthermore, in the present invention, if the reference value is set in a state where foreign matter is caught in the door, that is, a state where the elastic body having a hollow portion provided at the tip of the door is deformed, When a force is applied, it can be detected that a further change has occurred in the deformation state of the elastic body having a hollow portion provided at the front end of the door. Thus, even when clothes or belongings such as passengers outside the vehicle are caught, this can be detected, the vehicle can be stopped, and passenger accidents can be prevented.

  In addition, if deformation or damage due to secular change occurs temporarily or permanently in an elastic body with a hollow portion provided at the front end of the door, special adjustments can be made by setting a reference value in that state. It can be used continuously without the need for correction.

  In the present invention, for example, a transmitter and a receiver are installed on a door elastic member such as a door rubber having a cylindrical hollow space, and a signal amount of a transmission signal of the transmitter and a signal amount of a reception signal of the receiver And a foreign object detection device for a door having a control device for continuously controlling the signal amount of a transmission signal. As the transmission signal, light, ultrasonic waves, etc. can be used. The control device has a function of outputting the detection result to the external circuit as an electric signal and a function of receiving a signal from the external circuit and setting a detection reference value.

  Furthermore, the present invention operates so that the signal amount is always automatically adjusted to an appropriate level, and the signal amount immediately before the foreign object is sandwiched is temporarily stored as a reference value, and then the foreign object is detected. Because it is a method that detects foreign matter by changing the amount of signal at the time of installation, adjustment and correction etc. are basically unnecessary at the time of installation or after installation, and special technology for installation adjustment work is also unnecessary, so work Process and cost can be reduced.

Hereinafter, a foreign object detection device for a door according to the present invention will be described with reference to the drawings, taking a passenger door for a railway vehicle as an example.
FIG. 1 is a perspective view showing a schematic configuration of a foreign object detection device for a door according to the present invention, FIG. 2 is a cross-sectional view of a door-end rubber at a front end portion of a passenger door, and FIG. It is a front view of the double door double door for most general vehicles.

First, the door end of the double door 6 for a vehicle shown in FIG. 3 is provided with a door rubber 7 that is a hollow elastic body, and the transmitter 1 is provided above the hollow portion of the door rubber 7. A receiver 2 is provided at the bottom. Here, as shown in FIG. 2, a door-end rubber 7 is provided at the front end of the door 6 for getting on and off the vehicle, and a hollow portion 5 is provided in the door-end rubber 7.
And as shown in FIG. 1, the transmitter 1 and the receiver 2 are each installed in the up-and-down both ends of the door rubber | gum 7 so that the hollow part 5 may become a signal transmission path, and the transmitter 1 installed in the upper end The transmission signal 4 transmitted from is arranged so as to be received by the receiver 2 at the lower end. The transmitter 1 and the receiver 2 are connected to the control device 3.

  When foreign matter or the like is caught in the door 6 and the hollow portion 5 of the door rubber 7 receives an external force and its shape changes, the transmission signal 4 from the transmitter 1 reflects on the inner wall surface of the hollow portion 5. As a result, fluctuations in the spatial cross-sectional area and the like occur, signal transmission changes, and the signal amount of the received signal in the receiver 2 changes. By detecting this, it can be detected that a foreign object has been caught in the door 6.

  As a method of detecting the fluctuation of the signal amount, the control device 3 measures the difference between the received signal amount and the transmitted signal amount at a predetermined time, and sets this as a reference value in the form of temporary storage. Keep it. Thereafter, when the amount of received signal fluctuates and the fluctuation amount exceeds a predetermined allowable range from a preset reference value, there is a method of outputting the detection signal from the control device 3 to the outside. For the setting of the reference value, a method of inputting an electric signal from the outside to the control device 3 can be suitably applied.

  Further, in order to perform the detection operation stably, before the reference value is set, the amount of received signal at the receiver 2 is the optimum signal amount as possible regardless of the state of the door rubber 7 or the like. It is desirable to continuously control the signal amount of the transmission signal 4 so that

  As a result of adopting the above configuration, in the present invention, the user can arbitrarily set the conditions for setting the reference value, and since there is no significant variation in the detection sensitivity in the initial state, the shape of the door rubber, etc. Since the detection sensitivity with respect to the change can be maintained within a certain range and the use can be continued, it is not necessary to provide a dead zone for preventing a false detection, and the use can be continued without a false detection with a higher detection sensitivity. Therefore, it is possible to use a small foreign object with a high sensitivity and a setting that can be stably detected.

  In addition, if a reference value is set in a state in which foreign matter is caught in the door, that is, in a state in which the door rubber is deformed, force is further applied to the foreign material, and the deformation state of the door rubber further changes. You can detect what happened. Accordingly, when clothes or belongings such as passengers outside the vehicle are caught, this can be detected, the vehicle can be stopped, and passenger accidents can be prevented.

  Furthermore, when the vehicle starts to travel, it is impossible to detect that the clothes and belongings of passengers outside the vehicle are caught, and the passengers are not aware of the passengers themselves, and the vehicle crew judges that it is safe and starts traveling. After that, when the passenger tries to pull out the foreign matter caught in the vehicle, or when the vehicle gets caught by running, the door rubber is deformed via the foreign matter caught in, and the signal is detected and detected. Since this occurs, it is possible to take measures such as emergency stop of the vehicle.

  Furthermore, even when deformation or damage due to secular change has occurred temporarily or permanently in the door-end rubber, it is possible to continue using it without setting any special adjustments or corrections by setting a reference value in that state. .

  Furthermore, the present invention operates so that the signal amount is always automatically adjusted to an appropriate level, and the signal amount immediately before detecting the foreign matter is temporarily stored as a reference value, and the fluctuation of the signal amount thereafter Therefore, adjustment and correction after installation or after installation are basically unnecessary, and special techniques for installation adjustment work are not required, so work processes and costs can be reduced. .

  The present invention is not limited to the above-mentioned two-door double door system for vehicles, but can be used for a single-door door system or a plug door system. In FIG. 3, the transmitter 1 and the receiver 2 are respectively installed at the upper end and the lower end of the hollow portion 5 in the door-end rubber 7 of the entrance door. Rather than being installed inside the rubber 7, the transmitter 1 and / or the receiver 2 are installed outside the door rubber 7, and a reflector or the like provided inside the door rubber 7 from the outside of the door rubber 7. It is also possible to use a signal transmission method. Furthermore, it is possible to attach the transmitter 1 and / or the receiver 2 on the vehicle body side and transmit a signal through the gap between the vehicle body and the door 6. Of course, it is also possible to reverse the positions of the transmitter 1 and the receiver 2.

  Further, in this embodiment, as shown in FIG. 3, a method of installing a transmitter / receiver for each of two doors is used as an example, but one set of transmission / reception is provided only for one door on each side.・ By installing a receiver and using a relatively hard door rubber on the opposite door, the door rubber on the side on which the transmitter / receiver is installed can be configured to be reliably deformed. It is. This method is suitable for a single door.

Hereinafter, based on an Example, this invention is demonstrated more concretely.
FIG. 4 shows an operation example according to the embodiment of the present invention as a diagram, and the horizontal axis indicates the passage of time.
As the vehicle travel / stop 9 indicates, the reference value setting 13 indicates the reference value setting at the point 20 when the traveling vehicle stops after reaching the station and the door is opened for getting on and off as indicated by the door 8. The reference value is set 14 by the signal. The detection mask signal indicated by the detection mask 11 is set to the detection valid 15 at an appropriate timing before boarding and exiting and before closing the door. If any foreign matter is caught when the door is closed, the detection signal indicated by the detection operation 10 is in the detection state 16 due to the change in the signal amount. Then, an output signal 21 indicated by the output signal 12 is output from the control device, and the door restart 17 is performed automatically or manually by a crew member according to a predetermined procedure on the vehicle side. This allows the passenger to remove foreign objects.

Thereafter, if no foreign object is detected by reclosing 18 of the door, the vehicle starts to travel. However, as shown by the detection mask 11, the detection mask signal is temporarily set to detection invalid 22 at an appropriate timing before the start of travel, and thereafter Again, the reference value is set and updated by the signal of the reference value setting 13 and is updated again. After the detection is enabled again by the signal of the detection mask 11, the vehicle starts to travel 25.
At this time, when the sleeve of the clothes of the person on the home side is caught in the door, it is pulled by the start of traveling of the vehicle, force is applied to the door rubber, and the signal of the detection 26 becomes the detection state. At the same time, an output signal 27 is generated, and the vehicle can be urgently stopped 19 automatically or manually by the crew, and after the stop, the door can be opened and the foreign matter sandwiched between the doors can be removed safely. .
In addition, the malfunction can be avoided by setting the detection mask signal to the detection invalid 28 when the vehicle reaches an appropriate speed after traveling.

It is the perspective view which showed the typical structure of the foreign material detection apparatus for the doors which concerns on this invention. It is sectional drawing of the door-end rubber | gum of the front-end | tip part for boarding / alighting. It is the example of a front view of the double doors for vehicles, and the example of attachment of a transmitter / receiver. It is an operation | movement diagram which concerns on the Example of this invention.

Explanation of symbols

1. Transmitter
2. Receiver
3. Control device
4. Signal
5. Hollow part
6． door
7． Door rubber
8. Door
9. Vehicle running / stopped state
10. Detection operation
11. Detection mask
12. Output signal
13. Reference value setting

Claims (2)

A door tip comprising an elastic body with a hollow portion provided at the tip of the door;
A transmitter and a receiver;
A control device for adjusting a signal amount of a transmission signal from the transmitter, and a detection device comprising:
The transmission signal from the transmitter is arranged so that the receiver receives it through the hollow portion of the elastic body provided at the door, and the transmission signal that fluctuates when the elastic body provided at the door is deformed. The signal amount of the transmission signal from the transmitter is adjusted so that the receiver can receive the signal amount,
A door characterized in that a foreign object in the door is detected by comparing a signal amount stored as a reference value in the control device with a signal amount of a received signal accompanying deformation of an elastic body provided at the door end. Foreign object detection device for A door tip provided with an elastic body having a hollow portion provided at the front end of a vehicle door,
A transmitter and a receiver;
A control device for adjusting a signal amount of a transmission signal from the transmitter, and a detection device comprising:
The transmission signal from the transmitter is arranged so that the receiver receives it through the hollow portion of the elastic body provided at the door, and the transmission signal that fluctuates when the elastic body provided at the door is deformed. Adjust the signal amount of the transmission signal from the transmitter so that the signal amount can be received by the receiver,
By temporarily storing, as a reference value, the signal amount of the reception signal before starting the vehicle travel to the control device, and then comparing the signal amount of the reception signal when the elastic body provided on the door is deformed, Detects foreign objects on the door,
A foreign object detection device for a door, which detects a deformation of an elastic body provided at a door end of a door that is recognized to be in a closed state even after the vehicle starts to travel.

Images